Mutations only occur in DNA, and never are observed in RNA.
a. true
b. false
Ans: b. false
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Which of the following is the strongest evidence that cytokinins regulate cell divisions? There is _____
A) an increase of cyclin gene expression in tissues exposed to cytokinin B) a decrease of cyclin gene expression in tissues exposed to cytokinin C) an induction of shoot growths in tissues exposed to cytokinin D) an induction of root growths in tissues exposed to cytokinin E) an ability of cytokinin to interact with auxin at the molecular level and change auxin biosynthesis and transport
Choose the hormone that is NOT correctly matched with its chemical category.
A. polypeptides—ADH B. steroid—estradiol C. amine—FSH D. glycoprotein—LH E. steroid—testosterone
The best solutions to managing waste would include:
a. source reduction and application of natural decomposition processes. b. supporting the siting of a landfill in your community to reduce waste transportation costs. c. disposing of hazardous waste in oceans as the water dilutes the waste. d. shipping e-waste to poor countries to provide them jobs in extracting precious metals from the electronic devices.
RNA can be used as a template for the production of
DNA through the action of a. DNA polymerase. b. RNA polymerase. c. reverse transcriptase. d. ligase. e. restriction endonuclease.